Road-culvert.



No. 809,304. PATENTED JAN. 9, 1906. W. ISHAM & F. E. MILLER.

ROAD CULVBRT.

APPLICATION FILED DEG. 15, 1904.

UNITED STATES PATENT OFFICE.-

WILLIAM ISHAM AND FRANK E. MILLER, OF IONIA, MICHIGAN.

ROAD-CULVERT.

Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed December 15, 19%. Serial No. 237,001.

To all w/wm it may concern:

Be it known that we, WILLIAM ISHAM and FRANK E. MILLER, citizens of the United States, residing at Ionia, in the county of Ionia and State of Michigan, have invented certain new and useful Improvements in Road-Culverts; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention is an improved road-culvert; and it consists in the construction, combination, and arrangement of devices hereinafter described and claimed.

The object of our invention is to provide an improved culvert which is made of separable sections, which is adapted to be readily set up, and which when in use is capable of expanding and contracting under the action of frost Without becoming injured.

In the accompanying drawings, Figure 1 is an end elevation of a culvert embodying our improvements, showing the same set up. Fig. 2 is a detail perspective view of the basesection. Figs. 3 and 4 are similar views of the side sections.

Our improved culvert comprises a base-section 1 and a side section 2. The base-section is sembled on the base-section form an arch over the base-section, and their upper ends overlap, so that the upper end of one of the side sections bears against the stop-flange 5 of the other side section, as shown in Fig. 1. The side sections of the culvert are thus slidably connected together at their upper sides, and the culvert is thus enabled to expand and contract under the action of frost without danger of injury to the culvert. By providing each of the side sections with a stop-rib 5 the side sections are rendered interchangeable.

The sections of our improved culvert are preferably made of cast-iron; but they may be made of any other suitable material, and we do not desire to limit ourselves in this particular.

From the foregoing description, taken in connection with the accompanying drawings, the construction andoperation of our invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. Aculvert comprising abase-section having inturned flanges at its side edges on its upper side, and side sections having outturned flanges at their lower sides to engage said inturned flanges of the base-section.

2. A culvert comprising a base-section and side sections, said base and side sections having coen'gaging devices to lock the said sections to the base-section and prevent the lower portions of the side sections from moving outwardly on the base-section, said side sections being further provided with means to secure their upper portions together and permit lateral movement of said upper portions.

In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

WILLIAM ISHAM. FRANK E. MILLER.

Witnesses:

J. F. ISHAM,

ISAAC GEORGE. 

